package com.sw.c.utils;

import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import org.apache.commons.lang3.time.DateFormatUtils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.temporal.ChronoUnit;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.TimeZone;

/**
 * 时间工具类
 *
 * @author wyc
 */
public class DateUtil  extends org.apache.commons.lang3.time.DateUtils {

    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYY_MM_DD_ = "yyyy年-MM月-dd日";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd"
            , "yyyy-MM-dd HH:mm:ss"
            , "yyyy-MM-dd HH:mm"
            , "yyyy-MM"
            , "yyyy/MM/dd"
            , "yyyy/MM/dd HH:mm:ss"
            , "yyyy/MM/dd HH:mm"
            , "yyyy/MM"
            , "yyyy.MM.dd"
            , "yyyy.MM.dd HH:mm:ss"
            , "yyyy.MM.dd HH:mm"
            , "yyyy.MM"
    };

    /**
     * 计算两个时间差
     * 指定日期加上天数后的日期 Date类型
     *
     * @param endDate
     * @param nowDate 创建时间
     * @return
     * @throws ParseException
     */
    public static String retDatePoor(Date endDate, Date nowDate) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate() {
        return new Date();
    }

    /**
     * 计算相差天数
     */
    public static int differentDaysByMillisecond(Date date1, Date date2) {
        return Math.abs((int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24)));
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts) {
        try {
            return new SimpleDateFormat(format).parse(ts);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str.toString(), parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static HashMap<String, Integer> getDatePoor(Date endDate, Date nowDate) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        HashMap<String, Integer> map = new HashMap<>();
        map.put("day", (int) day);//天
        map.put("hour", (int) hour);//小时
        map.put("min", (int) min);//分
        return map;
    }

    public static final long getTimestamp() {
        return System.currentTimeMillis() / 1000;
    }

    /**
     * 获取当前时间指定天数后的时间
     *
     * @return
     */
    public static Date getsSpecifiedRearDayTime(Integer day) {
        //不能超过 且不能等于30天
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(getNowDate().getTime() + 3600 * 24 * 1000 * day);
        return cal.getTime();
    }

    /**
     * 指定时间指定年数的时间
     *
     * @return
     */
    public static Date addDateYear(Date date, Integer year) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);//设置起时间
        cal.add(Calendar.YEAR, year);//增加指定年数
        return cal.getTime();
    }

    /**
     * 指定时间指定月数的时间
     *
     * @return
     */
    public static Date addDateMonth(Date date, Integer month) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);//设置起时间
        cal.add(Calendar.MONTH, month);//增加指定年数
        return cal.getTime();
    }

    /**
     * 指定天数增加天数
     *
     * @return
     */
    public static Date addDateDay(Date date, Integer day) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);//设置起时间
        cal.add(Calendar.DATE, day);//增加指定年数
        return cal.getTime();
    }

    /**
     * 判断是否超过24小时
     *
     * @param date1
     * @param date2
     * @return boolean
     * @throws Exception
     */
    public static boolean judgmentDate(Date date1, Date date2) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-M-d HH:mm:ss");
        long cha = date1.getTime() - date2.getTime();
        System.out.println(cha);
        if (cha < 0) {
            //零点到八点之间，返回true
            if (cha >= -60 * 60 * 1000 * 8) {
                return true;
            }
            return false;
        }
        double result = cha * 1.0 / (1000 * 60 * 60);
        if (result <= 24) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * @MethodName: stringToDate
     * @Description: 字符串日期格式化date类型
     * @Param: [dateStr, date]
     * @Return: java.util.Date
     * @Author: wyc
     * @Date: 2020/5/10 15:37
     **/
    public static Date stringToDate(String dateStr, String pattern) {
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        Date date = null;
        try {
            date = format.parse(dateStr);
        } catch (ParseException e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
        }
        return date;
    }

    /**
     * 指定日期加上天数后的日期 string类型
     *
     * @param num     为增加的天数
     * @param newDate 创建时间
     * @return
     * @throws ParseException
     */
    public static String plusStrDay(int num, String newDate) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date currdate = format.parse(newDate);
        System.out.println("现在的日期是：" + currdate);
        Calendar ca = Calendar.getInstance();
        ca.setTime(currdate);
        ca.add(Calendar.DATE, num);// num为增加的天数，可以改变的
        currdate = ca.getTime();
        String enddate = format.format(currdate);
        System.out.println("增加天数以后的日期：" + enddate);
        return enddate;
    }

    /**
     * 指定日期加上天数后的日期 Date类型
     *
     * @param num     为增加的天数
     * @param newDate 创建时间
     * @return
     * @throws ParseException
     */
    public static Date plusDay(int num, Date newDate) {
        System.out.println("现在的日期是：" + newDate);
        Calendar ca = Calendar.getInstance();
        ca.setTime(newDate);
        ca.add(Calendar.DATE, num);// num为增加的天数，可以改变的
        newDate = ca.getTime();
        System.out.println("增加天数以后的日期：" + newDate);
        return newDate;
    }

    /**
     * 当前日期加上天数后的日期
     *
     * @param num 为增加的天数
     * @return
     */
    public static Date plusDayByNum(int num) {
        Date d = new Date();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String currdate = format.format(d);
        System.out.println("现在的日期是：" + currdate);

        Calendar ca = Calendar.getInstance();
        ca.add(Calendar.DATE, num);// num为增加的天数，可以改变的
        d = ca.getTime();

//        String enddate = format.format(d); //转化为字符串类型输出
//        System.out.println("增加天数以后的日期：" + enddate);
        System.out.println("增加天数以后的日期：" + d);
        return d;
    }

    /* *
     * @MethodName: wxTimeEnd
     * @Description: 微信支付完成时间格式化
     * @Param: [endTime]
     * @Return: java.util.Date
     * @Author: wyc
     * @Date: 2020/8/26 10:21
     **/
    public static Date wxTimeEnd(String endTime) throws ParseException {
        if (endTime == null || "".equals(endTime)) {
            return new Date();
        }
        SimpleDateFormat format = new SimpleDateFormat(YYYYMMDDHHMMSS);
        Date currdate = format.parse(endTime);
        return currdate;
    }

    /**
     * 去掉时分秒
     *
     * @param date
     * @param pattern
     * @return
     */
    public static Date formatonversion(Date date, String pattern) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        String s = format.format(date);
        date = format.parse(s);
        return date;
    }

    /***
     * 判断日期相差几个月  比较两个时间相差的月份
     * @param start
     * @param end
     * @return
     */
    public static int getMonth(Date start, Date end) {
        if (start.after(end)) {
            Date t = start;
            start = end;
            end = t;
        }
        Calendar startCalendar = Calendar.getInstance();
        startCalendar.setTime(start);
        Calendar endCalendar = Calendar.getInstance();
        endCalendar.setTime(end);
        Calendar temp = Calendar.getInstance();
        temp.setTime(end);
        temp.add(Calendar.DATE, 1);

        int year = endCalendar.get(Calendar.YEAR)
                - startCalendar.get(Calendar.YEAR);
        int month = endCalendar.get(Calendar.MONTH)
                - startCalendar.get(Calendar.MONTH);

        if ((startCalendar.get(Calendar.DATE) == 1)
                && (temp.get(Calendar.DATE) == 1)) {
            return year * 12 + month + 1;
        } else if ((startCalendar.get(Calendar.DATE) != 1)
                && (temp.get(Calendar.DATE) == 1)) {
            return year * 12 + month;
        } else if ((startCalendar.get(Calendar.DATE) == 1)
                && (temp.get(Calendar.DATE) != 1)) {
            return year * 12 + month;
        } else {
            return (year * 12 + month - 1) < 0 ? 0 : (year * 12 + month);
        }
    }


    /**
     * 将时间转换为时间戳
     * @param s 时间参数
     * @return
     * @throws ParseException
     */
    public static String dateToStamp(String s) throws ParseException {
        String res;
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date = simpleDateFormat.parse(s);
        long ts = date.getTime();
        res = String.valueOf(ts);
        return res;
    }


    /**
     * 将时间戳转换为时间
     * @param s 时间戳参数
     * @return
     */
    public static String stampToDate(String s) {
        String res;
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        long lt = new Long(s);
        Date date = new Date(lt);
        res = simpleDateFormat.format(date);
        return res;
    }

    public static Date stampTo1Date(String s) {
        String res;
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        long lt = new Long(s);
        Date date = new Date(lt);
//        res = simpleDateFormat.format(date);
        return date;
    }

    /**
     * @Description:比较两个时间大小 1：now > validity ；2：now < validity
     * @Author： wyc
     * @Param：[now:当前时间或指定的时间, validity：待判定的时间]
     * @return：int
     * @methodName：compareDate
     * @date：2021/6/17 9:04
     */
    public static int compareDate(Date now, Date validity) {
        if (validity != null) {
            try {
                if (now.getTime() > validity.getTime()) {
                    return 1;
                } else if (now.getTime() < validity.getTime()) {
                    return 2;
                } else {
                    return 0;
                }
            } catch (Exception exception) {
                exception.printStackTrace();
            }
        }
        return 0;
    }

    /**
     * 获得当天0点时间
     *
     * @return
     */
    public static Date getTimesmorning() {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    /**
     * 获得昨天0点时间
     *
     * @return
     */
    public static Date getYesterdaymorning() {
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(getTimesmorning().getTime() - 3600 * 24 * 1000);
        return cal.getTime();
    }

    /**
     * 获得前天（两天 前）
     *
     * @return
     */
    public static Date gettwoDaymorning() {
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(getTimesmorning().getTime() - 3600 * 24 * 1000 * 2);
        return cal.getTime();
    }

    /**
     * 获得当天近3天时间
     *
     * @return
     */
    public static Date getTriduumFromNow() {
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(getTimesmorning().getTime() - 3600 * 24 * 1000 * 3);
        return cal.getTime();
    }

    /**
     * 获得当天近7天时间
     *
     * @return
     */
    public static Date getWeekFromNow() {
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(getTimesmorning().getTime() + 3600 * 24 * 1000 * 7);
        return cal.getTime();
    }

    /**
     * 获得七天前的
     *
     * @return
     */
    public static Date getsevenDaymorning() {
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(getTimesmorning().getTime() - 3600 * 24 * 1000 * 7);
        return cal.getTime();
    }

    /**
     * 获得当天近30天时间
     *
     * @return
     */
    public static Date getThirtyDay() {
        Calendar now = Calendar.getInstance();
        now.add(Calendar.DAY_OF_MONTH, +30);
        return now.getTime();
    }

    /**
     * 获得当天近90天时间
     *
     * @return
     */
    public static Date getNinetyDay() {
        Calendar now = Calendar.getInstance();
        now.add(Calendar.DAY_OF_MONTH, +90);
        return now.getTime();
    }

    /**
     * 获得当天24点时间
     *
     * @return
     */
    public static Date getTimesnight() {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, 24);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    /**
     * 获得本周一0点时间
     *
     * @return
     */
    public static Date getTimesWeekmorning() {
        Calendar cal = Calendar.getInstance();
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
        cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
        return cal.getTime();
    }

    /**
     * 获得本周日24点时间
     *
     * @return
     */
    public static Date getTimesWeeknight() {
        Calendar cal = Calendar.getInstance();
        cal.setTime(getTimesWeekmorning());
        cal.add(Calendar.DAY_OF_WEEK, 7);
        return cal.getTime();
    }

    /**
     * 获得本月第一天0点时间
     *
     * @return
     */
    public static Date getTimesMonthmorning() {
        Calendar cal = Calendar.getInstance();
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
        cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH));
        return cal.getTime();
    }

    /**
     * 获得本月最后一天24点时间
     *
     * @return
     */
    public static Date getTimesMonthnight() {
        Calendar cal = Calendar.getInstance();
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
        cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
        cal.set(Calendar.HOUR_OF_DAY, 24);
        return cal.getTime();
    }

    /**
     * 上月初0点时间
     *
     * @return
     */
    public static Date getLastMonthStartMorning() {
        Calendar cal = Calendar.getInstance();
        cal.setTime(getTimesMonthmorning());
        cal.add(Calendar.MONTH, -1);
        return cal.getTime();
    }

    /**
     * 本季度开始点时间
     *
     * @return
     */
    public static Date getCurrentQuarterStartTime() {
        Calendar c = Calendar.getInstance();
        int currentMonth = c.get(Calendar.MONTH) + 1;
        SimpleDateFormat longSdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        SimpleDateFormat shortSdf = new SimpleDateFormat("yyyy-MM-dd");
        Date now = null;
        try {
            if (currentMonth >= 1 && currentMonth <= 3) {
                c.set(Calendar.MONTH, 0);
            } else if (currentMonth >= 4 && currentMonth <= 6) {
                c.set(Calendar.MONTH, 3);
            } else if (currentMonth >= 7 && currentMonth <= 9) {
                c.set(Calendar.MONTH, 4);
            } else if (currentMonth >= 10 && currentMonth <= 12) {
                c.set(Calendar.MONTH, 9);
            }
            c.set(Calendar.DATE, 1);
            now = longSdf.parse(shortSdf.format(c.getTime()) + " 00:00:00");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return now;
    }

    /**
     * 本季度结束点时间
     *
     * @return
     */
    public static Date getCurrentQuarterEndTime() {
        Calendar cal = Calendar.getInstance();
        cal.setTime(getCurrentQuarterStartTime());
        cal.add(Calendar.MONTH, 3);
        return cal.getTime();
    }

    /**
     * 本年開始点时间
     *
     * @return
     */
    public static Date getCurrentYearStartTime() {
        Calendar cal = Calendar.getInstance();
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
        cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.YEAR));
        return cal.getTime();
    }

    /**
     * 本年结束点时间
     *
     * @return
     */
    public static Date getCurrentYearEndTime() {
        Calendar cal = Calendar.getInstance();
        cal.setTime(getCurrentYearStartTime());
        cal.add(Calendar.YEAR, 1);
        return cal.getTime();
    }

    /**
     * 上年開始点时间
     *
     * @return
     */
    public static Date getLastYearStartTime() {
        Calendar cal = Calendar.getInstance();
        cal.setTime(getCurrentYearStartTime());
        cal.add(Calendar.YEAR, -1);
        return cal.getTime();
    }

    /**
     * @Description: 与当前时间相差几个月
     * @Param：[date]
     * @return：java.lang.Integer
     * @methodName：monthCompare
     * @date：2021/10/9 15:56
     */
    public static Integer monthCompare(String dateStr) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Date nowDate = new Date();
        String nowDateStr = sdf.format(nowDate);

        LocalDate from = LocalDate.parse(dateStr);
        LocalDate to = LocalDate.parse(nowDateStr);
        Integer months = Math.toIntExact(ChronoUnit.MONTHS.between(from, to));
        System.out.println("months：" + months);
        return months;
    }

    /**
     * @Description: 获取”前一天“指定的时间点 比如获取10点数据  date=10即可
     * @Param：[date]
     * @return：java.util.Date
     * @methodName：getEndTime
     * @date：2021/10/19 17:48
     */
    public static Date getStartTime(String date) {
        Calendar time = Calendar.getInstance();
        time.add(Calendar.DATE, -1);
        time.set(Calendar.HOUR_OF_DAY, 22);
        time.set(Calendar.MINUTE, 0);
        time.set(Calendar.SECOND, 0);
        time.set(Calendar.MILLISECOND, 0);
        return time.getTime();
    }

    /**
     * @Description: 获取当天指定的时间点 比如获取10点数据  date=10即可
     * @Param：[date]
     * @return：java.util.Date
     * @methodName：getEndTime
     * @date：2021/10/19 17:48
     */
    public static Date getEndTime(String date) {
        Calendar time = Calendar.getInstance();
        time.set(Calendar.HOUR_OF_DAY, 10);
        time.set(Calendar.MINUTE, 00);
        time.set(Calendar.SECOND, 00);
        time.set(Calendar.MILLISECOND, 999);
        return time.getTime();
    }

    /**
     * @Description: 获取”第二天“指定的时间点 比如获取10点数据  date=10即可
     * @Param：[date]
     * @return：java.util.Date
     * @methodName：getEndTime
     * @date：2021/10/19 17:48
     */
    public static Date getNextDayEndTime(String date) {
        Calendar time = Calendar.getInstance();
        time.add(Calendar.DATE, 1);
        time.set(Calendar.HOUR_OF_DAY, 22);
        time.set(Calendar.MINUTE, 00);
        time.set(Calendar.SECOND, 00);
        time.set(Calendar.MILLISECOND, 999);
        return time.getTime();
    }

    /**
     * @Description: 毫秒时间转换为 时 分 秒
     * @Param：[time]
     * @return：java.lang.String
     * @methodName：convertMillis
     * @date：2021/10/20 9:30
     */
    public static String convertMillis(long time) {
        SimpleDateFormat sdf = new SimpleDateFormat("H'时':m'分':s'秒'");

        sdf.setTimeZone(TimeZone.getTimeZone("UTC"));

        System.out.println(sdf.format(new Date(time)));
        return sdf.format(new Date(time));
    }

    /**
     * @param date  时间
     * @param pattern  时间格式,默认格式：yyyy-MM-dd HH:mm:ss
     * @return  返回一个String类型的时间
     */
    public static String formatDateToString(Date date, String pattern) {
        if (StringUtils.isBlank(pattern)) {
            pattern =YYYY_MM_DD_HH_MM_SS;
        }
        SimpleDateFormat formatter = new SimpleDateFormat(pattern);
        return formatter.format(date);
    }

    /**
     * @param dateStr 字符串类型的时间
     * @param pattern 世家格式，默认格式：yyyy-MM-dd HH:mm:ss
     * @return 返回一个Date类型的时间
     */
    public static Date parseStringToDate(String dateStr, String pattern) throws ParseException {
        if (StringUtils.isBlank(pattern)) {
            pattern =YYYY_MM_DD_HH_MM_SS;
        }
        SimpleDateFormat formatter = new SimpleDateFormat(pattern);
        return formatter.parse(dateStr);
    }
}